45145223 has 4 divisors (see below), whose sum is σ = 46246368. Its totient is φ = 44044080.

The previous prime is 45145213. The next prime is 45145229. The reversal of 45145223 is 32254154.

It is a happy number.

45145223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32254154 = 2 ⋅16127077.

It is a cyclic number.

It is not a de Polignac number, because 45145223 - 2¹⁰ = 45144199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45145192 and 45145201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45145229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550511 + ... + 550592.

It is an arithmetic number, because the mean of its divisors is an integer number (11561592).

Almost surely, 2^45145223 is an apocalyptic number.

45145223 is a deficient number, since it is larger than the sum of its proper divisors (1101145).

45145223 is a wasteful number, since it uses less digits than its factorization.

45145223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101144.

The product of its digits is 4800, while the sum is 26.

The square root of 45145223 is about 6719.0194969207. The cubic root of 45145223 is about 356.0715438209.

Adding to 45145223 its reverse (32254154), we get a palindrome (77399377).

The spelling of 45145223 in words is "forty-five million, one hundred forty-five thousand, two hundred twenty-three".